Spreadsheet Dependency in Apparel Planning
The operational, financial and strategic risks of running apparel planning in spreadsheets, and the threshold where the risk exceeds the cost of migrating.
Overview
Spreadsheet-based merchandising planning is not failing because spreadsheets are bad tools. It is failing because the planning function has grown — in SKU complexity, channel count, and data volume — beyond what spreadsheets were designed to handle.
This analysis examines the cost of spreadsheet dependency in apparel planning across three dimensions: operational overhead (reconciliation and coordination), financial exposure (errors in OTB, carry-over, and buy decisions), and strategic cost (decisions delayed or avoided because the data isn't accessible). It is drawn from our own work automating spreadsheet planning processes with apparel teams — the direct, repeated experience of untangling the planning workbooks this article describes — supplemented where noted by published research on spreadsheet error rates.
Risk Category 1: Operational Overhead
Reconciliation cost
The most quantifiable cost of spreadsheet planning is the time consumed by reconciliation — keeping the OTB file, assortment plan, and buy plan aligned as decisions are made and revised.
Each time a style is added to or removed from the assortment, the following manual updates are required:
- OTB: Update planned receipts for the affected department and period
- Assortment plan: Update style count, newness ratio, and depth targets
- Buy plan: Update or remove the style's quantities
- Size curve reference: Verify the size distribution is still assigned correctly
- Allocation model: Remove or adjust door-level quantities
In a 200-SKU assortment, style-level changes happen dozens of times during the pre-season review window. The reconciliation burden is not one large event — it is continuous, and it consumes the highest-leverage planning time.
Read the full report.
Industry analysis for apparel brands — where planning processes break down, and the practical implications for your own planning process.
- How OTB, assortment, and in-season planning fit together — and where the handoffs between them break
- Specific process gaps that drive markdown and inventory risk
- The process changes that close each gap, and why each one works
- Practical implications you can apply to your own planning process
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